SOLUTION: hi, i need help to simplify an expression x^2+5x-36/8x^2+35x+12 * 64x^2-9/8x^2+69x-27 any help out there:)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: hi, i need help to simplify an expression x^2+5x-36/8x^2+35x+12 * 64x^2-9/8x^2+69x-27 any help out there:)      Log On


   

Question 38420: hi, i need help to simplify an expression
x^2+5x-36/8x^2+35x+12 * 64x^2-9/8x^2+69x-27

any help out there:)
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay, the idea is to factor and cancel...so from
[x^2 + 5x - 36) / (8x^2 + 35x + 12)] * [(64x^2 - 9) / (8x^2 + 69x - 27)]
we can factor into
[(x + 9)(x - 4) / (8x + 3)(x + 4)] * [(8x + 3)(8x - 3) / (8x - 3)(x + 9)
now cancel top and bottom and get
(x - 4) / (x + 4)